Finding the Fourth Proportional to 11,851.56, 17,778.15 and 3,953.79

Step by Step Solution

1. Step 1: Write the proportion equation
   11,851.56 : 17,778.15 = 3,953.79 : x
2. Step 2: Convert to fraction form
   11,851.56/17,778.15 = 3,953.79/x
3. Step 3: Cross multiply
   11,851.56x = 17,778.15 × 3,953.79
4. Step 4: Simplify right side
   11,851.56x = 70,291,071.69
5. Step 5: Solve for x
   x = 70,291,071.69/11,851.56
6. Step 6: Final answer
   x = 5,930.96